Gunbreaker, Warrior, Knight, Paladin, Spellblade, Red Mage, Winged One, Lord, Squire, Sword Saint, Fell Knight, Warrior of Light, Holy Knight, Squire, Rune Knight, Lunar Paladin, Dark Knight of Remorse, Abes' Star Player, Archlord, Knight of the Sacred Shield, Azure Pathfinder, Duelist, Prince of Lucis
Effect
+0
--
+1
Slash Attack+2
Thancred Only: Light ATK+2 / Slash Res Piercing Rate+2
+2
Slash Attack+3
Thancred Only: Light ATK+3 / Slash Res Piercing Rate+4
+3
Slash Attack+5
Thancred Only: Light ATK+5 / Slash Res Piercing Rate+7
+4
Slash Attack+8
Thancred Only: Light ATK+8 / Slash Res Piercing Rate+10
+5
Slash Attack+15
Thancred Only: Light ATK+15 / Slash Res Piercing Rate+20
Its between accuracy and overall damage. There won't be a right answer. You need accuracy to even land hit on evade build and several evade unit, but without that build assault should be worth it if you had nothing else since it affect your overall damage IMO.
Anonymous
In case you don't know, this is the ONLY sword that Thancred can equip.